Investigation of the coupled Lamb waves propagation in viscoelastic and anisotropic multilayer composites by Legendre polynomial method
Investigation of the coupled Lamb waves propagation in viscoelastic and anisotropic multilayer composites by Legendre polynomial method
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DOI：
10.1016/j.compstruct.2016.06.068
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发表时间：
2016-10
影响因子：
6.3
通讯作者：
Souhail Dahmen;M. B. Amor;M. Ghozlen
中科院分区：
文献类型：
--
作者：
Souhail Dahmen;M. B. Amor;M. Ghozlen
本文采用Legendre正交多项式方法研究了阻尼多层任意各向异性复合材料层合板中导波的衰减问题。层压板由石墨-环氧复合材料制成，其铺层顺序为[0/n/0]。通过与刚度矩阵法得到的精确解的比较以及与已知的纯弹性多层板的兰姆波解的比较，说明了多项式方法的有效性。研究了不同分层顺序下耦合兰姆波的色散和衰减。示出了粘性对色散曲线的影响。确定了在高频和低频中具有最小衰减的频率和模式的组合。这些频率和模式对于NDT应用非常重要，因为它们在选择最佳检测频率方面起着关键作用。
In this paper, the attenuation of guided waves in damped multilayered arbitrary anisotropic composite laminates is investigated using a Legendre orthogonal polynomial approach. The laminate is made of the graphite–epoxy composite material with the layering sequence [0/ϕ/0]. The validity of the polynomial approach is illustrated through a comparison with exact solution obtained from the Stiffness matrix method and a comparison with earlier known Lamb wave solution of pure elastic multilayered plate. The dispersion and attenuation of coupled Lamb waves with different layering sequences are investigated. The viscous effect on dispersion curves is shown. The combination of frequencies and modes with minimum attenuation in high and low frequencies are determined. These frequencies and modes are of great importance for NDT applications since they play a critical role in the selection of the optimal inspection frequencies.